Methods can be defined as formalized or systematic way of doing routine or repetitive jobs. The managers decide in advance the common way of doing a job. So, that
(a) There is no doubt in the minds of employees;
(b) There can be uniformity in actions of the employees;
(c) These help in applying the techniques of standardization and simplification;
(d) Act as guide for employees.
If the common way of doing the job is not decided in advance then there will be confusion and comparison will not be possible.
Rules spell out special actions or non-actions of the employees. There is no discretion allowed in rules, i.e., they must be followed strictly and if rules are not followed then strict actions can be taken against employees who are disobeying the rules. Rules are spelt out to create the environment of discipline in the organisation. For example, there can be rule of no smoking in the organisation. Rules generally guide the general behaviour of the employees and employees cannot make any changes in them.